/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:18:09,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:18:09,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:18:09,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:18:09,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:18:09,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:18:09,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:18:09,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:18:09,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:18:09,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:18:09,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:18:09,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:18:09,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:18:09,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:18:09,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:18:09,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:18:09,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:18:09,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:18:09,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:18:09,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:18:09,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:18:09,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:18:09,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:18:09,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:18:09,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:18:09,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:18:09,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:18:09,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:18:09,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:18:09,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:18:09,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:18:09,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:18:09,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:18:09,579 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:18:09,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:18:09,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:18:09,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:18:09,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:18:09,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:18:09,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:18:09,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:18:09,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:18:09,581 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:18:09,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:18:09,581 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:18:09,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:18:09,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:18:09,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:18:09,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:18:09,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:18:09,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:18:09,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:18:09,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:18:09,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:18:09,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:18:09,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:18:09,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:18:09,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:18:09,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:18:09,867 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:18:09,880 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:18:09,884 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:18:09,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:18:09,886 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:18:09,887 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-07-21 16:18:09,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda8472c6/4dd40f70b28c4c5ab206937ec7accaf6/FLAG4ce3e1236 [2020-07-21 16:18:10,414 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:18:10,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-07-21 16:18:10,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda8472c6/4dd40f70b28c4c5ab206937ec7accaf6/FLAG4ce3e1236 [2020-07-21 16:18:10,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda8472c6/4dd40f70b28c4c5ab206937ec7accaf6 [2020-07-21 16:18:10,826 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:18:10,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:18:10,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:18:10,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:18:10,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:18:10,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:18:10" (1/1) ... [2020-07-21 16:18:10,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fca7f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:10, skipping insertion in model container [2020-07-21 16:18:10,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:18:10" (1/1) ... [2020-07-21 16:18:10,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:18:10,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:18:11,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:18:11,034 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:18:11,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:18:11,067 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:18:11,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11 WrapperNode [2020-07-21 16:18:11,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:18:11,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:18:11,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:18:11,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:18:11,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11" (1/1) ... [2020-07-21 16:18:11,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11" (1/1) ... [2020-07-21 16:18:11,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11" (1/1) ... [2020-07-21 16:18:11,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11" (1/1) ... [2020-07-21 16:18:11,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11" (1/1) ... [2020-07-21 16:18:11,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11" (1/1) ... [2020-07-21 16:18:11,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11" (1/1) ... [2020-07-21 16:18:11,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:18:11,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:18:11,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:18:11,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:18:11,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:18:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:18:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:18:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-07-21 16:18:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-07-21 16:18:11,261 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-07-21 16:18:11,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:18:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:18:11,263 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-07-21 16:18:11,263 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-07-21 16:18:11,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:18:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:18:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-07-21 16:18:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:18:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:18:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:18:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:18:11,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:18:11,501 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:18:11,501 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 16:18:11,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:18:11 BoogieIcfgContainer [2020-07-21 16:18:11,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:18:11,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:18:11,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:18:11,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:18:11,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:18:10" (1/3) ... [2020-07-21 16:18:11,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706636e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:18:11, skipping insertion in model container [2020-07-21 16:18:11,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:18:11" (2/3) ... [2020-07-21 16:18:11,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706636e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:18:11, skipping insertion in model container [2020-07-21 16:18:11,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:18:11" (3/3) ... [2020-07-21 16:18:11,526 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-07-21 16:18:11,563 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:18:11,571 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:18:11,587 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:18:11,617 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:18:11,617 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:18:11,618 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:18:11,618 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:18:11,618 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:18:11,618 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:18:11,618 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:18:11,618 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:18:11,645 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-21 16:18:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 16:18:11,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:18:11,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:18:11,654 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:18:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:18:11,659 INFO L82 PathProgramCache]: Analyzing trace with hash 589228543, now seen corresponding path program 1 times [2020-07-21 16:18:11,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:18:11,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702565633] [2020-07-21 16:18:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:18:11,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:18:11,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:18:11,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 16:18:11,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:18:11,846 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 16:18:11,847 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:18:11,859 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:11,859 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:18:11,860 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 16:18:11,910 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 16:18:11,911 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:18:11,914 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:18:11,915 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:18:11,915 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-21 16:18:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:18:11,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:18:11,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702565633] [2020-07-21 16:18:11,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:18:11,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:18:11,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717038507] [2020-07-21 16:18:11,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:18:11,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:18:11,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:18:11,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:18:11,959 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-07-21 16:18:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:18:12,063 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-07-21 16:18:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:18:12,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 16:18:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:18:12,075 INFO L225 Difference]: With dead ends: 40 [2020-07-21 16:18:12,075 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 16:18:12,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:18:12,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 16:18:12,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 16:18:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 16:18:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2020-07-21 16:18:12,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 11 [2020-07-21 16:18:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:18:12,125 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2020-07-21 16:18:12,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:18:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2020-07-21 16:18:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 16:18:12,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:18:12,126 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:18:12,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:18:12,332 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:18:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:18:12,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1258570105, now seen corresponding path program 1 times [2020-07-21 16:18:12,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:18:12,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660964335] [2020-07-21 16:18:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:18:12,410 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:18:12,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:18:12,411 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:18:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:18:12,426 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:18:12,446 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:18:12,447 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:18:12,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:18:12,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:18:12 BoogieIcfgContainer [2020-07-21 16:18:12,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:18:12,698 INFO L168 Benchmark]: Toolchain (without parser) took 1869.11 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 102.0 MB in the beginning and 120.9 MB in the end (delta: -18.9 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:18:12,699 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:18:12,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.75 ms. Allocated memory is still 144.7 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:18:12,701 INFO L168 Benchmark]: Boogie Preprocessor took 125.17 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.8 MB in the beginning and 180.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:18:12,701 INFO L168 Benchmark]: RCFGBuilder took 313.06 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:18:12,702 INFO L168 Benchmark]: TraceAbstraction took 1187.08 ms. Allocated memory is still 202.4 MB. Free memory was 166.0 MB in the beginning and 120.9 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:18:12,707 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.75 ms. Allocated memory is still 144.7 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.17 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 91.8 MB in the beginning and 180.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.06 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 166.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1187.08 ms. Allocated memory is still 202.4 MB. Free memory was 166.0 MB in the beginning and 120.9 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L33] struct mutex m; [L34] m.is_locked = 0 VAL [m={2:0}] [L36] CALL mutex_lock(&m) VAL [a={2:0}] [L21] EXPR a->is_locked VAL [a={2:0}, a={2:0}, a->is_locked=0] [L21] COND FALSE !(a->is_locked == 1) [L22] a->is_locked = 1 VAL [a={2:0}, a={2:0}] [L36] RET mutex_lock(&m) VAL [m={2:0}] [L40] CALL mutex_lock(&m) VAL [a={2:0}] [L21] EXPR a->is_locked VAL [a={2:0}, a={2:0}, a->is_locked=1] [L21] COND TRUE a->is_locked == 1 [L21] CALL err() [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 1 SDslu, 47 SDs, 0 SdLazy, 17 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 240 SizeOfPredicates, 6 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...